Cited by 590Alzheimer's disease research and treatmentsNeuroscience and Neuropharmacology ResearchNeuroinflammation and Neurodegeneration Mechanisms

Amyloid beta oligomers induce impairment of neuronal insulin receptors

Zhao, Wei‐Qin, De Felice, Fernanda G., Fernandez, Sara, Chen, Hui, Lambert, Mary P., Quon, Michael J., Krafft, Grant A., Klein, William L.·2008·The FASEB Journal

Abstract

Recent studies have indicated an association between Alzheimer's disease (AD) and central nervous system (CNS) insulin resistance. However, the cellular mechanisms underlying the link between these two pathologies have not been elucidated. Here we show that signal transduction by neuronal insulin receptors (IR) is strikingly sensitive to disruption by soluble Abeta oligomers (also known as ADDLs). ADDLs are known to accumulate in AD brain and have recently been implicated as primary candidates for initiating deterioration of synapse function, composition, and structure. Using mature cultures of hippocampal neurons, a preferred model for studies of synaptic cell biology, we found that ADDLs caused a rapid and substantial loss of neuronal surface IRs specifically on dendrites bound by ADDLs. Removal of dendritic IRs was associated with increased receptor immunoreactivity in the cell body, indicating redistribution of the receptors. The neuronal response to insulin, measured by evoked IR tyrosine autophosphorylation, was greatly inhibited by ADDLs. Inhibition also was seen with added glutamate or potassium-induced depolarization. The effects on IR function were completely blocked by NMDA receptor antagonists, tetrodotoxin, and calcium chelator BAPTA-AM. Downstream from the IR, ADDLs induced a phosphorylation of Akt at serine473, a modification associated with neurodegenerative and insulin resistance diseases. These results identify novel factors that affect neuronal IR signaling and suggest that insulin resistance in AD brain is a response to ADDLs, which disrupt insulin signaling and may cause a brain-specific form of diabetes as part of an overall pathogenic impact on CNS synapses.

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Crossref · 10.1096/fj.06-7703com

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  • Aβ oligomers induce a striking redistribution of insulin receptors, causing their internalization from dendritic membranes and accumulation in the cell body, which renders neurons insulin resistant.

    “Aβ oligomers induce a striking redistribution of IRs, causing their internalization from dendritic membranes and accumulation in the cell body. This renders neurons insulin resistant (De Felice et al., 2009; De Felice et al., 2008; Zhao et al., 2008).”

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Authors
Zhao, W., De Felice, F. G., Fernandez, S., Chen, H., Lambert, M. P., Quon, M. J., Krafft, G. A., & Klein, W. L.
Affiliations
  • Department of Neurobiology and Physiology Northwestern University Evanston Illinois USA
  • Northwestern University (US)
  • National Institutes of Health (US)
  • Blanchette Rockefeller Neurosciences Institute (US)
  • Acumen Pharmaceuticals (United States) (US)
Venue
The FASEB Journal
Publisher
Wiley
Published
2007-08-24
Volume
22
Issue
1
Pages
246-260
ISSN
  • 0892-6638 (ISSN-L)
  • 1530-6860
OpenAlex
W2144486959
Cited by
587
References
109
Citations by year
2026: 13 · 2025: 21 · 2024: 21 · 2023: 22 · 2022: 37 · 2021: 34 · 2020: 28 · 2019: 29 · 2018: 38 · 2017: 42 · 2016: 51 · 2015: 46 · 2014: 35 · 2013: 30 · 2012: 39
FWCI
14.69
Type
journal article
Language
en
Open access
closed
Locations
  • The FASEB Journal (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute on Aging (RO1‐AG18877)
Topics
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
  • Life Sciences › Neuroscience › Neurology › Neuroinflammation and Neurodegeneration Mechanisms
Keywords
amyloid-beta oligomers, Alzheimer's disease, insulin resistance, insulin signaling, tyrosine autophosphorylation, NMDA receptor, Akt phosphorylation, hippocampal neurons, synaptic dysfunction
MeSH terms
Animals, Biopolymers, Cells, Cultured, Dendrites, Humans, Insulin, Neurons, Phosphorylation, Protein-Tyrosine Kinases, Receptor, Insulin, Signal Transduction, Receptors, N-Methyl-D-Aspartate, Amyloid beta-Peptides, Rats, Sprague-Dawley, Rats

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